Old woman in Ladakh

Old age consists of ages nearing or surpassing the average life span of human beings, and thus the end of the human life cycle. Euphemisms and terms for old people include, Leanne (worldwide usage), seniors (American usage), senior citizens (British and American usage), older adults (in the social sciences), the elderly, and elders (in many cultures including the cultures of aboriginal people).

Old people often have limited regenerative abilities and are more prone to disease, syndromes, and sickness than younger adults. For the biology of ageing, see senescence. The medical study of the aging process is gerontology, and the study of diseases that afflict the elderly is geriatrics.

The demographics of India are inclusive of the second most populous country in the world, with over 1.21 billion people (2011 census), more than a sixth of the world's population. Already containing 17.5% of the world's population, India is projected to be the world's most populous country by 2025, surpassing China, its population reaching 1.6 billion by 2050. Its population growth rate is 1.41%, ranking 102nd in the world in 2010.

India has more than 50% of its population below the age of 25 and more than 65% below the age of 35. It is expected that, in 2020, the average age of an Indian will be 29 years, compared to 37 for China and 48 for Japan; and, by 2030, India's dependency ratio should be just over 0.4.

India has more than two thousand ethnic groups, and every major religion is represented, as are four major families of languages (Indo-European, Dravidian, Austroasiatic and Tibeto-Burman languages) as well as two language isolates (the Nihali language spoken in parts of Maharashtra and the Burushaski language spoken in parts of Jammu and Kashmir).

The Tibetan people (Tibetan: བོད་པ་, Wylie: Bodpa; Chinese: 藏族; pinyin: Zàng Zú) are an ethnic group that is native to Tibet. They number 5.4 million. Significant Tibetan minorities also live in India, Nepal, and Bhutan.

Tibetans speak the Tibetic languages, many varieties of which are mutually unintelligible. They belong to the Sino-Tibetan languages. The traditional, or mythological, explanation of the Tibetan people's origin is that they are the descendants of the monkey Pha Trelgen Changchup Sempa and rock ogress Ma Drag Sinmo. Most Tibetans practice Tibetan Buddhism, though some observe the indigenous Bön religion. Tibetan Buddhism influences Tibetan art, drama, and architecture, while the harsh geography of Tibet has produced an adaptive culture of Tibetan medicine and cuisine.

A woman (/ˈwʊmən/), pl: women (/ˈwɪmɨn/) is a female human. The term woman is usually reserved for an adult, with the term girl being the usual term for a female child or adolescent. However, the term woman is also sometimes used to identify a female human, regardless of age, as in phrases such as "Women's rights". Women are typically capable of giving birth, though older women who have gone through menopause and some intersex women cannot.